PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-14:43:00
G01     75.7           33.3                8.0 +/-    0.88      13.0 +/-    0.88  0.030 / 0.030
G07     134.9          34.8                8.8 +/-    1.24      14.0 +/-    1.24  0.030 / 0.040
G11     56.3           32.9                6.2 +/-    0.49      10.2 +/-    0.49  0.050 / 0.090
G13     279.6          38.0                7.3 +/-    1.47      11.1 +/-    1.47  0.060 / 0.100
G15     308.4          12.7                5.1 +/-    2.06      13.5 +/-    2.06  0.050 / 0.100
G17     226.8          65.6                7.9 +/-    1.11       8.6 +/-    1.11  0.050 / 0.110
G18     52.1           19.9                6.7 +/-    0.96      14.8 +/-    0.96  0.030 / 0.050
G19     221.2          35.1                8.5 +/-    1.21      13.5 +/-    1.21  0.030 / 0.050
G28     11.8           60.2                6.8 +/-    0.86       7.7 +/-    0.86  0.040 / 0.070
G30     130.3          67.0                8.4 +/-    0.85       9.0 +/-    0.85  0.050 / 0.080